Static recovery activation energy of pure copper at room temperature

Thermally activated energy, which varies linearly with static recovered strain, is calculated from static recovery experiments of pure copper initially deformed by strain-rate-controlled tensile tests. By the evidence of dislocation morphology, the activation energy at the initial static recovery is 48 kJ mol−1, which is the energy for dislocation annihilation by glide or cross-slip. Once dislocation annihilation processes are exhausted, more energy is required for subgrains to form and then grow. The recovered strain is slowed down and eventually saturated.